Need Help With Grade 12 Chemistry Question!?
2.5 M of phosphorus pentachloride are mixed with 0.60 M of phosphorus trichloride and chlorine. Will a reaction occur? In which direction will the reaction occur? If K250℃=0.042, what are the final equilibrium concentrations?
- OCVLv 67 years agoFavorite Answer
K = (c(PCl3)* c(Cl2)) / c(PCl5)
Put in the values and solve K, if K is greather than 1, the reaction will occur.
For the second question, you need to calculate all concentrations.
K = 0,042
c(PCl5) = c0 -x
c(PCl3) = c0 + x
c(Cl2) = c0 +x
K = [ (c(PCl3)+x)* (c(Cl2))+x) / (c(PCl5)-x) ]
Now solve for x, you'll get a quadratic equation. However, only one solution for x will be the right one (the other one will make the concentrations negative)